.page-faq {
  --faq-cut: 16px;
  position: relative;
  padding-bottom: clamp(48px, 9vw, 110px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
  padding-bottom: clamp(12px, 2vw, 20px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-bottom: clamp(26px, 4.5vw, 52px);
  padding: clamp(26px, 5vw, 54px) clamp(20px, 4vw, 46px) clamp(34px, 5.5vw, 58px);
  background:
    linear-gradient(140deg, rgba(23, 209, 198, 0.16), transparent 48%),
    linear-gradient(320deg, rgba(122, 92, 255, 0.14), transparent 42%),
    var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 38px), calc(100% - 38px) 100%, 0 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(41, 64, 106, 0.42) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(41, 64, 106, 0.28) 0 1px, transparent 1px 96px);
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 5.4vw, 58px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--title);
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-hero__jump a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  color: var(--ink);
  background: var(--teal);
  border-color: var(--teal);
}

/* ---------- 外壳与分类轨道 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-rail {
  position: sticky;
  top: 10px;
  z-index: 5;
  margin: 0 0 4px;
  padding: 10px 0 12px;
  background: linear-gradient(180deg, var(--ink) 72%, transparent);
}

.page-faq .faq-rail__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list li {
  flex: none;
  scroll-snap-align: start;
}

.page-faq .faq-rail__link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  color: var(--muted);
  text-decoration: none;
  transition: color 0.28s var(--ease), border-color 0.28s var(--ease), padding-left 0.28s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--teal);
  border-color: var(--teal);
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  position: relative;
  scroll-margin-top: 72px;
  margin-bottom: clamp(16px, 2.6vw, 26px);
  padding: clamp(22px, 4vw, 44px);
  background-color: var(--ink-2);
  background-image: repeating-linear-gradient(90deg, rgba(41, 64, 106, 0.35) 0 1px, transparent 1px 84px);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-chapter--alt {
  --title: #081226;
  --text: #081226;
  --muted: #4C5F7C;
  --line: #C9D6E8;
  --line-soft: rgba(41, 64, 106, 0.26);
  background-color: var(--paper);
  background-image: repeating-linear-gradient(90deg, rgba(41, 64, 106, 0.13) 0 1px, transparent 1px 84px);
}

.page-faq .faq-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2.4vw, 26px);
  align-items: end;
  margin-bottom: 12px;
}

.page-faq .faq-chapter__num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(38px, 6vw, 84px);
  line-height: 0.76;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1px var(--teal);
  opacity: 0.8;
}

.page-faq .faq-chapter__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 2.6vw, 32px);
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--title);
}

.page-faq .faq-chapter__lede {
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 三步卡 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 18px 22px 22px;
  background: rgba(8, 18, 38, 0.62);
  border: 1px solid var(--line-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.page-faq .faq-chapter--alt .faq-step {
  background: rgba(255, 255, 255, 0.78);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--teal), rgba(23, 209, 198, 0));
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  transform: translateY(-3px);
  border-color: var(--orange);
  background: rgba(255, 122, 47, 0.1);
}

.page-faq .faq-step__no {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.page-faq .faq-step__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--title);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0;
  background: rgba(8, 18, 38, 0.55);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  overflow: hidden;
}

.page-faq .faq-chapter--alt .faq-figure {
  background: rgba(255, 255, 255, 0.7);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-acc {
  border-top: 1px solid var(--line-soft);
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .accordion__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 40px 16px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.5;
  color: var(--title);
  transition: color 0.28s var(--ease);
}

.page-faq .accordion__head::-webkit-details-marker {
  display: none;
}

.page-faq .accordion__head:hover {
  color: var(--teal);
}

.page-faq .accordion__head::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 18px;
  color: var(--orange);
  transition: transform 0.32s var(--ease);
}

.page-faq .accordion__item[open] .accordion__head::after {
  transform: translateY(-50%) rotate(135deg);
}

.page-faq .faq-qcode {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .faq-qtext {
  min-width: 0;
}

.page-faq .faq-qmeta {
  margin-left: auto;
  flex: none;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-top: 4px;
}

.page-faq .accordion__body {
  padding: 0 0 18px;
  max-width: 72ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
  transition: border-color 0.3s var(--ease);
}

.page-faq .accordion__body p {
  margin: 0;
}

.page-faq .accordion__item[open] .accordion__body {
  border-left: 2px solid var(--teal);
  padding-left: 16px;
}

/* ---------- 条目列表 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-faq .faq-points {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-point {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-point:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-point__k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--blue);
  padding-top: 3px;
}

.page-faq .faq-point__v {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-chapter--alt .faq-point__v {
  color: #1B2B47;
}

.page-faq .faq-points--compact .faq-point {
  grid-template-columns: 44px minmax(0, 1fr);
}

.page-faq .faq-points--compact .faq-point__k {
  color: var(--lime);
}

/* ---------- 版本轨道 ---------- */
.page-faq .faq-track {
  display: flex;
  gap: 14px;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  padding: 4px 0 16px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-version {
  flex: 0 0 min(258px, 74vw);
  scroll-snap-align: start;
  padding: 18px 18px 20px;
  background: rgba(18, 36, 74, 0.72);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--violet);
}

.page-faq .faq-version--now {
  border-top-color: var(--lime);
  background: rgba(23, 209, 198, 0.1);
}

.page-faq .faq-version__tag {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-version__name {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--title);
}

.page-faq .faq-version__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 邮箱条 ---------- */
.page-faq .faq-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: clamp(18px, 3vw, 26px);
  padding: 16px 18px;
  background: rgba(8, 18, 38, 0.6);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-mail__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-mail__addr {
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--orange);
  word-break: break-all;
}

/* ---------- 补充说明与操作 ---------- */
.page-faq .faq-note {
  margin: clamp(14px, 2.2vw, 20px) 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

/* ---------- 桌面：侧边分类轨道 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 24px;
    margin: 0;
    padding: 4px 0 0 16px;
    background: none;
    border-left: 1px solid var(--line-soft);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    border: 0;
    padding: 7px 0 7px 12px;
    position: relative;
  }

  .page-faq .faq-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 1px;
    background: var(--line);
    transform: translateY(-50%);
    transition: width 0.28s var(--ease), background-color 0.28s var(--ease);
  }

  .page-faq .faq-rail__link:hover::before,
  .page-faq .faq-rail__link:focus-visible::before {
    width: 14px;
    background: var(--teal);
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-version {
    flex: 0 0 268px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .accordion__head::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__link::before,
  .page-faq .faq-hero__jump a {
    transition: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-step:focus-within {
    transform: none;
  }
}
</PAGE_CSS>>>